Volume 7A: XView Programming Manual

Example 18-15. Selection reply procedure (continued)

do {

Atom *targets = (Atom *)value;

char *target_name;

if (targets[--length]) {

target_name = (char *)xv_get(server, SERVER_ATOM_NAME,

targets[length]);

textsw_insert(textsw, "\t", 1);

textsw_insert(textsw, target_name, strlen(target_name));

textsw_insert(textsw, "\n", 1);

}

} while(length);

}

else

if (target == ATOM(server, "TIMESTAMP")) {

char buf[10];

textsw_insert(textsw, "TIMESTAMP of acquisition: ", 26);

sprintf(buf, "%U\n", *(unsigned long *)value);

textsw_insert(textsw, buf, strlen(buf));

}

else

if (target == ATOM(server, "LENGTH")) {

char buf[10];

textsw_insert(textsw, "Length of selection: ", 21);

sprintf(buf, "%d\n", *(int *)value);

textsw_insert(textsw, buf, strlen(buf));

}

else

if (target == ATOM(server, "STRING")) {

static int incr = False;

if (type == ATOM(server, "INCR")) {

textsw_insert(textsw, "Contents of the selection:\n", 27);

incr = True;

}

else

if (length) {

if (!incr)

textsw_insert(textsw, "Contents of the selection:\n", 27);

textsw_insert(textsw, (char *)value, length);

textsw_insert(textsw, "\n", 1);

}

else

incr = False;

}

else

if (target == ATOM(server, "DELETE")) {

textsw_insert(textsw, "The Selection has been deleted\n", 31);

}

textsw_insert(textsw, LINE, strlen(LINE));

}

428 XView Programming Manual

18.9.0.2 Sample error procedure

The error procedure for this example is shown in Example 18-16.

Example 18-16. Sample error procedure

–

SelectionError.c

SelectionError(sel, target, errorCode)

Selection_requestor sel;

Atom target;

int errorCode;

{

Atom rank;

char *rank_string;

char *target_string = (char *)xv_get(server,

SERVER_ATOM_NAME, target);

char msg[100];

rank = (Atom)xv_get(sel, SEL_RANK);

rank_string = (char *)xv_get(server, SERVER_ATOM_NAME, rank);

sprintf(msg, "Selection failed for rank ‘‘%s’’ on target ‘‘%s’’: ",

rank_string, target_string);

textsw_insert(textsw, msg, strlen(msg));

switch(errorCode) {

case SEL_BAD_CONVERSION :

textsw_insert(textsw, "Conversion Rejected",

strlen("Conversion Rejected"));

break;

case SEL_BAD_TIME:

textsw_insert(textsw, "Bad Time Match",

strlen("Bad Time Match"));

break;

case SEL_BAD_WIN_ID:

textsw_insert(textsw, "Bad Window Match",

strlen("Bad Window Match"));

break;

case SEL_TIMEDOUT:

textsw_insert(textsw, "Timeout", strlen("Timeout"));

break;

}

}

Selections

Selections 429

18.10 Selection Package Summary

Table 18-3 lists the selection procedures. Table 18-4 lists the selection attributes, including

all the attributes for the SELECTION package, as well as the SELECTION_OWNER,

SELECTION_REQUESTOR, and the SELECTION_ITEM attributes. These attributes and proce-

dures are described fully in the XView Reference Manual.

Table 18-3. Selection Procedures

Procedure Package

sel_convert_proc() Selection Owner

sel_post_req() Selection Requestor

Table 18-4. Selection Attributes

SEL_APPEND_TYPE_NAMES SEL_PROP_FORMAT

SEL_APPEND_TYPES SEL_PROP_INFO

SEL_COPY SEL_PROP_LENGTH

SEL_CONVERT_PROC SEL_RANK

SEL_DATA SEL_RANK_NAME

SEL_DONE_PROC SEL_REPLY_PROC

SEL_FIRST_ITEM SEL_TIME

SEL_FORMAT SEL_TIMEOUT_VALUE

SEL_LENGTH SEL_TYPE

SEL_LOSE_PROC SEL_TYPE_INDEX

SEL_NEXT_ITEM SEL_TYPE_NAME

SEL_OWN SEL_TYPE_NAMES

SEL_PROP_DATA SEL_TYPES

XV_XID

430 XView Programming Manual

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